4 Written Questions
3 Multiple Choice Questions
- the homolog has evolved more slowly in mice.
- allows us to indirectly date fossils up to billions of years old based on minerals in surrounding volcanic strata
- they showed that organic molecules such as amino acids could be produced from inorganic molecules
3 True/False Questions
Phylogeny is the evolutionary history of related groups of organisms. Organisms are grouped into taxa based on homologous characteristics, shared traits that result from common ancestry. Which statement is true?
Homologous structures look the same and serve the same function, but they differ in evolutionary origin and structure.
The term "monophyletic" refers to a taxon that includes an ancestral species and all of its descendants.
Ancestral traits are always simpler than derived traits. → they provide positional information in the embryo
Why do some scientists believe that RNA, rather than DNA, was the first genetic material?
All the proto-cells on early Earth contained RNA.
RNA has both information storage and catalytic properties.
RNA could have evolved into DNA.
RNA can replicate more accurately than DNA.
RNA contains uracil in place of thymine → the homolog has evolved more slowly in mice.
Hox genes are thought to play an important role in the development of different morphologies because _____.
they affect the timing of reproductive development in the organism
they paved the way for the development of multicellular organisms
they affect the order of genes on certain chromosomes
they affect the timing of development in the embryo
they provide positional information in the embryo → they provide positional information in the embryo